Burj Khalifa is ridiculously tall, 828 m (plus a small tip) to be more precise, making it the tallest building in world. It's so tall that every other building in Dubai, even other super-tall skyscrapers, look tiny compared to this sleek shiny tower which seems to disappear into the sky. From the air the tower looks like a symmetric Y, a design apparently inspired from a lily, but from the ground it resembles an elegant sci-fi rocket. The 163 floors - where the top one is at 621 m - are used for both corporations, residences and hotels. Yes, here you can stay in an Armani suite. At first, during the construction, it was called Burj Dubai, but when completed it changed name to Burj Khalifa, probably in honor of Sheikh Khalifa, emir of Abu Dhabi, as he bailed out the project when it was badly needed.